Question 1

Which of the following best describes the difference between general and special senses?

Accepted Answer

General senses are widely distributed and have simple receptors, while special senses are localized and have complex sense organs.

Question 2

A patient is unable to localize a light touch stimulus on their forearm. Which property of sensory receptors most likely explains this?

Accepted Answer

The receptive field in the forearm is large, making localization difficult.

Question 3

Which of the following is TRUE regarding tonic and phasic receptors?

Accepted Answer

Tonic receptors are slow-adapting and remind you of an injury long after it occurs.

Question 4

Which mechanoreceptor is most responsible for detecting deep pressure and high-frequency vibration?

Accepted Answer

Pacinian (lamellated) corpuscle

Question 5

A person is exposed to a constant, non-painful stimulus. Over time, they stop noticing it. What is this phenomenon called?

Accepted Answer

Adaptation

Question 6

Which of the following best describes the pathway for temperature sensation from the skin to the brain?

Accepted Answer

Spinothalamic pathway, crossing at the spinal cord

Question 7

Which receptor type is most likely to be activated by tissue injury and the release of prostaglandins?

Accepted Answer

Nociceptors

Question 8

Which of the following is a function of proprioceptors?

Accepted Answer

Monitoring the position of joints and muscles

Question 9

A patient has damage to the dorsal columns of the spinal cord. Which sensation is most likely to be affected?

Accepted Answer

Fine touch and proprioception

Question 10

Which of the following equations best represents the relationship between stimulus intensity and receptor potential in a rapidly adapting receptor?

Accepted Answer

$$V_{r} = V_{max} e$$^{-kt}$$

Question 11

Which of the following is TRUE about the organization of sensory and motor pathways in the spinal cord?

Accepted Answer

Sensory pathways are highly organized and mostly located in the posterior columns.

Question 12

Which of the following best describes the role of the thalamus in sensory pathways?

Accepted Answer

It acts as a relay station for sensory information before it reaches the cortex.

Question 13

Which of the following is a characteristic of baroreceptors?

Accepted Answer

They monitor changes in pressure within blood vessels and organs.

Question 14

A person is unable to sense the position of their limbs after a spinal cord injury. Which receptor type and pathway are most likely affected?

Accepted Answer

Proprioceptors and dorsal column pathway

Question 15

Which of the following best describes the difference between the somatic and autonomic nervous systems?

Accepted Answer

The somatic system controls skeletal muscle, while the autonomic system controls smooth muscle, cardiac muscle, and glands.

Question 16

Which of the following is TRUE regarding the structure and function of Meissner's (tactile) corpuscles?

Accepted Answer

They are abundant in the fingertips and adapt rapidly to fine touch.

Question 17

Which of the following best describes the function of the macula densa in the nephron?

Accepted Answer

It monitors osmolarity and chemical composition of the filtrate.

Question 18

Which of the following is the correct order of neurons in a typical ascending sensory pathway?

Accepted Answer

First-order neuron, second-order neuron, third-order neuron

Question 19

Which of the following best explains why pain from a heart attack may be felt in the left arm?

Accepted Answer

Sensory pathways from the heart and left arm converge on the same spinal neurons, causing referred pain.

Ch 15: General and Special Senses: Structure, Function, and Pathways

Study Guide - Practice Questions